<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>选择器练习</title>
    <style>
        #p1{color: green}

        .c1{color: blue}

        h1,h2,h3{
            background: yellow;
        }

        input[type='text']{
            background: red;}

        *{
            border: 1px solid red;
        }


    </style>
</head>
<body>
<ul>
    <li id="p1">张学友</li>
    <li>郭富城</li>
    <li class="c1">刘德华</li>
</ul>

<h1 class="c1">悟空</h1>
<h1>八戒</h1>
<h1>沙僧</h1>

<h2>刘备</h2>

<input type="text">
<input type="password">

</body>
</html>